1, GSM 2G: (such as mobile, China Unicom 2G card) not need jailbreak Plug and Play, normal.

2, WCDMA: (such as China Unicom 3G card, US AT&T 3G Card) without jailbreak, normal.but for US Sprint, you must install a patch "GPP3to2"(ONLY for ios8.2 and earlier) .then call and sms and 2G network is OK, or you can make the jailbreak and then add the third network patch.

How to install "GPP3to2"(Olny be suitable for ios8.2 and earlier)?

3, CDMA: (such as telecommunications card) can not be used.

When iOS6,iOS7 and iOS8 official version, jailbreak, you can install three network patch, GSM, WCDMA and can work normally. CDMA can also work on calling, SMS, but not for 3G network.


IOS 5.11 (containing the following system):
Add patch after jailbreak, perfect use GSM, WCDMA, CDMA

How to install three network patch?